<template>
  <div class="app-container">
    <el-row :gutter="10" class="mb8">
      <el-col :span="1.5">
        <el-button
            type="primary"
            plain
            icon="Upload"
            @click="handleImport"
        >导入</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
            type="warning"
            plain
            icon="Download"
            @click="handleExport"
        >导出</el-button>
      </el-col>
      <right-toolbar></right-toolbar>
    </el-row>

    <!--
     :load="fetchData"   表示点击当前节点箭头，加载下一级集合数据，当前节点id传递过去
     hasChildren: 'hasChildren'  当前节点是否有孩子，有孩子就箭头。
     children: 'children' 当前节点，孩子集合。
    -->
    <el-table v-loading="loading"
        :data="categoryList"
        style="width: 100%"
        row-key="id"
        border
        lazy
        :load="fetchData"
        :tree-props="{ children: 'children', hasChildren: 'hasChildren' }"
    >
      <el-table-column prop="name" label="分类名称" />
      <el-table-column prop="imageUrl" label="图标" #default="scope">
        <img :src="scope.row.imageUrl" width="50" />
      </el-table-column>
      <el-table-column prop="orderNum" label="排序" />
      <el-table-column prop="status" label="状态" #default="scope">
        {{ scope.row.status == 1 ? '正常' : '停用' }}
      </el-table-column>
      <el-table-column prop="createTime" label="创建时间" />
    </el-table>




    <el-dialog :title="upload.title" v-model="upload.open" width="400px" append-to-body>
      <el-upload
          ref="uploadRef"
          :limit="1"
          accept=".xlsx, .xls"
          :headers="upload.headers"
          :action="upload.url + '?updateSupport=' + upload.updateSupport"
          :disabled="upload.isUploading"
          :on-progress="handleFileUploadProgress"
          :on-success="handleFileSuccess"
          :auto-upload="false"
          drag
      >
        <el-icon class="el-icon--upload"><upload-filled /></el-icon>
        <div class="el-upload__text">将文件拖到此处，或<em>点击上传</em></div>
        <template #tip>
          <div class="el-upload__tip text-center">
            <div class="el-upload__tip">
              <el-checkbox v-model="upload.updateSupport" />是否更新已经存在的用户数据
            </div>
            <span>仅允许导入xls、xlsx格式文件。</span>
            <el-link type="primary" :underline="false" style="font-size:12px;vertical-align: baseline;" @click="importTemplate">下载模板</el-link>
          </div>
        </template>
      </el-upload>
      <template #footer>
        <div class="dialog-footer">
          <el-button type="primary" @click="submitFileForm">确 定</el-button>
          <el-button @click="upload.open = false">取 消</el-button>
        </div>
      </template>
    </el-dialog>



  </div>
</template>

<script setup name="Category">
import { getTreeSelect } from "@/api/product/category";
import { getToken  } from '@/utils/auth.js'
const { proxy } = getCurrentInstance()

const categoryList = ref([]);
const loading = ref(true);

const data = reactive({
  queryParams:{

  }
})

const { queryParams } = toRefs(data)

//数据列表
/*const fetchData = async (row, treeNode, resolve) => {
  // 向后端发送请求获取数据
  let data = []

  await  getTreeSelect(row.id).then(result=>{
    data = result.data
  })

  // 返回数据
  resolve(data)
}*/

const fetchData = async (row, treeNode, resolve) => {

  // 向后端发送请求获取数据
  const {data} = await  getTreeSelect(row.id)

  // 返回数据
  resolve(data)

}

function getList(id){
  loading.value = true
  getTreeSelect(id).then(result=>{
    categoryList.value = result.data
    loading.value = false
  })

}

getList(0);



//导出事件处理
function handleExport(){
  proxy.download("product/category/export",{
    ...queryParams.value,
  }, `category_${new Date().getTime()}.xlsx`);
}









const upload = reactive({
  title: '导入分类',
  open: false,
  headers: {
    Authorization: 'Bearer ' + getToken()
  },
  url: import.meta.env.VITE_APP_BASE_API + "/product/category/import",
  updateSupport:0,    //0表示不支持更新已有数据，1表示运行更新已有数据。暂时不考虑
  isUploading: false, //是否正在上传数据

})






//导入按钮，弹出对话框
function handleImport(){
  upload.open = true
}

function handleFileUploadProgress(event, file, fileList){
  upload.isUploading = true
}

function handleFileSuccess(response, file, fileList){
  upload.open = false;
  upload.isUploading = false;
  proxy.$refs["uploadRef"].handleRemove(file);
  proxy.$alert("<div style='overflow: auto;overflow-x: hidden;max-height: 70vh;padding: 10px 20px 0;'>" + response.msg + "</div>", "导入结果", { dangerouslyUseHTMLString: true });
  getList(0);
}

function importTemplate(){
  //暂时以下载真实文件当模板文件使用。否则，还需要后端增加映射。
  // proxy.download("product/category/importTemplate",{}, `category_template.xlsx`);
  proxy.download("product/category/export",{
    ...queryParams.value,
  }, `category_template.xlsx`);
}

function submitFileForm(){
  proxy.$refs["uploadRef"].submit();
}

</script>